Coke-oven door



(NO Model.)

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' UNITED STATES PATENT OFFICEo VILLIAM H. BECKWITH, OF LATROBE, PENNSYLVANIA.

COKE-OVEN DOOR.

SPECIFICATION forming part of Letters Patent No. 307,258, dated October 28, 1884.

Application iiled Januaryl, 1884. (No model.)

To @ZZ whom 2715 may concern.-

The present invention consists in a novel construction and mode of operating the airinlet door at the top of the furnace or oven front.

The drawing shows a perspective View of Iny improved oven door or front, in which A indicates the lower door or section for the insertion and withdrawal of the charge; B, the upper section to permit the leveling of the charge, and C the air-inlet door or slide,which is made to ext-end entirely across the upper section, B, from side to side, andis guided at its ends by upright ribs or guides a, formed upon the body of door B. The damper-slide or door C is made of approximately straight form from end to end, or slightly higher at the Iniddle than at the ends, and the airinlet I is of like forni, so that whenthe slide is moved back from over the inletopening a body or stratum of air of uniform depth may enter the oven from side to side, thereby affecting all parts of the charge alike. In this way the slow combustion or oxidation of the coking process can be much more perfectly regulated than with doors moving in a horizontal plane, which throw the air to one side and tend to produce unequal combustion at different points. This feature is one of great importance in coke-ovens, as will be readily understood, and insures a more perfect pro duct. The required amount of air may also be admitted nearer tothe crown of the oven under this plan than under the former construction.

For the purpose of actuating the slide and holding it at any desired elevation, I provide a lever, D, which is formed with an eccen-` tric or cam-shaped head, C, and pivoted to the door B as shown, the head C being arranged to bear against a lug or projection, d, midway between the ends of the slide, and consequently to raise or lower both ends of the slide equally and simultaneously. The lug being vertically in line with pivot e of the lever D, the slide will remain at whatever adj ustinent may be given it, and its weight Awill prevent the lever from changing its position.

I do not in this application claim anything embraced in my former patent, above referred do.

I do not claim, broadly, a vertically-moving damper, `my invention and claim being confined to the combination,with such damper, of the means shown and described for operating the same and retaining it in position.

Having thus described my invention, what I claim is In combination with an oven-door provided with guides a and air-inlet b, slide C, having its ends mounted in said guides, and provided with lug d, andlever D, pivoted to the door, and having eccentric head o bearing against the lug, substantially as and for the purpose set forth.

VILLI AM BECKWITH.

VitIIesses ALEX. Y. DoUGLAss, GEO. N. BnoKwITII. 

